\name{deletediagonals}
\alias{deletediagonals}
\title{Delete diagonals}
\usage{deletediagonals(x, diagonals=1)}
\description{Replace a diagonal of elements of a matrix with NA}
\details{Used for creating artifical missing values in matrices without
causing any full row or column to be completely missing}
\value{The original matrix with some values missing}
\author{Henning Redestig}
\arguments{\item{x}{The matrix}
\item{diagonals}{The diagonal to be replaced, i.e. the first,
second and so on when looking at the fat version of the matrix
(transposed or not) counting from the bottom.
Can be a vector to delete more than one diagonal.}}